Deadline:15 Feb 2017
View Abstract Submission Instructions
Results Notification: 29 Mar 2017
Registration Opens: 29 Mar 2017
Nomination Deadline: 25 Jan 2017 (Closed)
Workshop: Physical Modeling of Gps and Insar Data with Unicycle
Free of Charge to AOGS2017 Attendees on a First-Come-First-Served Basis
Participants are expected to bring their own laptop with a recent version of Matlab already installed.
Requires Advanced Registration
About the Workshop
Several decades of space geodetic monitoring has brought a wealth of data documenting the cycle of strain accumulation and release around plate boundaries. The short-term tectonic deformation is well understood in terms of the activation of fault slip, viscoelastic flow in the lower crust and mantle and the diffusion of pore fluids. In this hands-on workshop, we will describe how to build physical models of plate boundaries strain evolution. We will describe from the ground up how to simulate postseismic deformation data, in particular, GPS and InSAR data. We will describe several cases of interest including the 2012 Mw 8.6 Indian Ocean earthquake, the 2015 Mw 7.8 Gorkha, Nepal earthquake and the 2009 Mw 7.8 Dusky Sound, New Zealand earthquake. We will first recall the main rheological assumptions: How does friction govern fault slip? How do creep mechanisms control viscoelastic flow? We will show how to simulate geodetic time series based on physical assumptions about stress release mechanisms. Finally, we will describe how to create numerical simulations of earthquake cycles. We will describe the basic characteristics of fault friction that allow earthquake ruptures to occur spontaneously. The workshop will be designed for geologists, and geodesists interested in earthquake mechanics who have limited experience in physics and programming. The simulations will be carried out in Matlab using the Unicycle software.